Things I Want To Implement

- The shaky-screen effect Peter mentioned before
- Circular enemy/bullet trajectories. Tried lerp but kinda failed on me :/ . Right now messing around with polar coordinates which are less flexible but seem to be working better.
- Powerups: rapid-fire, shield, missiles
- Enemy, wave, and level classes. Enemies would have an image, number of hits to die, and some sort of behavior data structure that would describle their path and firing patterns. Levels probably some sequence of events like wave spawning, cutscenes/dialogue, etc.

Lot to do, but will be fun :)